- Industry: Mining
- Number of terms: 33118
- Number of blossaries: 0
- Company Profile:
The U.S. Bureau of Mines (USBM) was the primary United States Government agency conducting scientific research and disseminating information on the extraction, processing, use, and conservation of mineral resources.
Founded on May 16, 1910, through the Organic Act (Public Law 179), USBM's missions ...
An isometric mineral, (U,Ca,Ce)<sub>2</sub>(Nb,Ta)<sub>2</sub>O<sub>6</sub>(OH,F) ; pyrochlore group; radioactive; yellow-brown; with samarskite in pegmatites in Mitchell County, NC, and at Hybla, ON, Canada. Formerly called hatchettolite. Compare: betafite
Industry:Mining
An isometric mineral, 16(Na(H<sub>2</sub>O)(AlSi<sub>2</sub>O<sub>6</sub>)) ; zeolite group; in white to slightly tinted radiating aggregates or granular masses; a late primary or hydrothermal mineral in mafic igneous rocks, an alkaline lake precipitate, and in silicic tuffs and tuffaceous sandstones. Formerly called analcite.
Industry:Mining
An isometric mineral, 2(Mn<sub>4</sub>Be<sub>3</sub>(SiO<sub>4</sub>)<sub>3</sub>S) ; manganese may be replaced by iron toward danalite, or by Zn toward genthelvite; forms tetrahedra; Mohs hardness, 6 to 6- 1/2; in veins with quartz, hornblende, and iron oxide; in pegmatites, and some alkaline igneous rocks.
Industry:Mining
An isometric mineral, 4(AgBr) ; yellow, in surface oxidation deposits of silver ores in arid climates. Formerly called bromyrite. Compare: iodargyrite
Industry:Mining
An isometric mineral, 4(AgCl) ; sectile; forms waxy white, yellow, or pearl-gray incrustations, darkening to violet on exposure to light; a supergene mineral occurring in silver veins; an important source of silver. Formerly called cerargyrite.
Industry:Mining
An isometric mineral, 4(AgCl) ; sectile; forms waxy white, yellow, or pearl-gray incrustations, darkening to violet on exposure to light; a supergene mineral occurring in silver veins; an important source of silver. Formerly called cerargyrite.
Industry:Mining
An isometric mineral, 4(KCl) ; cubic cleavage; bitter salty taste; soft; white; in evaporite deposits and around fumaroles; the chief source of potassium.
Industry:Mining
An isometric mineral, 4(KCl) ; cubic cleavage; bitter salty taste; soft; white; in evaporite deposits and around fumaroles; the chief source of potassium.
Industry:Mining
An isometric mineral, 4(KCl) ; cubic cleavage; bitter salty taste; soft; white; in evaporite deposits and around fumaroles; the chief source of potassium.
Industry:Mining
An isometric mineral, 4(NaCl) ; cubic cleavage; soft; salty tasting; forms disseminated grains or crystals in sedimentary rocks, or aggregates of large cubic crystals; granular to massive, the latter as extensive sedimentary beds ranging in thickness from less than 1 mm to more than 50 m, also in convoluted masses called salt domes; a typical constituent of playa lake deposits in arid regions.
Industry:Mining
